期刊
FOOD HYDROCOLLOIDS
卷 108, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodhyd.2020.105959
关键词
Bioactive film; Whey protein; Lactic acid bacteria; Cell viability; Mechanical properties; Antilisterial activity
资金
- European Union's H2020 Research and Innovation programme [817936]
- MIUR, National Operational Program ESF-ERDF Research and Innovation 2014-2020, Action I.1 Dottorati Innovativi con caratterizzazione industriale
- H2020 Societal Challenges Programme [817936] Funding Source: H2020 Societal Challenges Programme
The objective of the work was to study the viability and antimicrobial activity of bacteriocin-producing lactic acid bacteria (LAB) incorporated into whey protein/inulin/gelatine (WP) edible films in presence or absence of nutrient (modified MRS broth). Moreover, the role of the cell on the film structure and properties has been investigated. The results of the work showed that WP-based films were able to ensure a high viability of the bacteriocin-producing strain L. curvatus 54M16 during 28 days of storage at 4 degrees C. The addition of nutrient in the film matrix slightly affected the viability of the cells, but it was critical for the antimicrobial activity of the films. Films in presence of nutrient showed a good antimicrobial activity against L. innocua C6 as in vitro system as on cooked ham. The presence of LAB has a significant effect on the structure of the film: it reduced the viscosity of the film forming solution and improved the elasticity and the percentage of elongation. Whereas, no effect was observed for water vapour transmission rate and solubility. Thus, WP-based films in presence of modified MRS broth can be used as effective delivery and carrier systems for lactic acid bacteria to develop bioactive edible film or coating with antimicrobial properties.
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